CVE-2023-5685 Xnio: stackoverflowexception when the chain of notifier states becomes problematically big
An attacker can cause a denial of service by triggering a stack overflow in the XNIO library through large notifier state chains.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-5685?
CVE-2023-5685 is a high-severity denial of service vulnerability in Red Hat Build of Keycloak, published on 22 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in XNIO. The XNIO NotifierState that can cause a Stack Overflow Exception when the chain of notifier states becomes problematically large can lead to uncontrolled resource management and a possible denial of service (DoS).
Weakness: CWE-400
Which versions are affected by CVE-2023-5685?
2 open source packages ship an affected version, including org.jboss.xnio:xnio-api.
| Package | Affected | Fixed in |
|---|---|---|
org.jboss.xnio:xnio-api Maven | All versions | 3.8.14.Final |
org.jboss.xnio:xnio-api Maven | All versions | 3.8.14.Final |
How do I fix CVE-2023-5685?
Upgrade org.jboss.xnio:xnio-api to 3.8.14.Final or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-5685 being exploited?
There is no known exploitation of CVE-2023-5685 in the wild and no public exploit code.
Sources
Also known as CLSA-2026-1771978226, CLSA-2026-1780620672, DEBIAN-CVE-2023-5685, GHSA-7f88-5hhx-67m2, UBUNTU-CVE-2023-5685.